CN207530032U - A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing - Google Patents

A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing Download PDF

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Publication number
CN207530032U
CN207530032U CN201721697482.6U CN201721697482U CN207530032U CN 207530032 U CN207530032 U CN 207530032U CN 201721697482 U CN201721697482 U CN 201721697482U CN 207530032 U CN207530032 U CN 207530032U
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China
Prior art keywords
metallic conductor
lithium ion
cell polar
ion cell
improve
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CN201721697482.6U
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Chinese (zh)
Inventor
邓国梁
李宇明
胡昌军
周燕飞
南春雷
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Ganzhou Zhongjin High Energy Battery Material Co., Ltd.
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Ganzhou Gold High Energy Battery Material Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model discloses a kind of lithium ion cell polar ears of high sealing liquid-leakage preventing, the lithium ion cell polar ear increases the adhesive force between metallic conductor and polymer insulating film, make the two bonding more firm, so as to improve the sealing performance of battery core, simultaneously, because improving the surface roughness of metallic conductor, so as to improve the welding performance of metallic conductor, and reduce the surface-active of metallic conductor, enhance the ability that its anti-electrolyte corrodes, so as to further improve the sealing performance of battery core, leakage of lithium ion battery is prevented.The lithium ion cell polar ear increases the adhesive force between metallic conductor and polymer insulating film, make the two bonding more firm, so as to improve the sealing performance of battery core, meanwhile because of the surface roughness for improving metallic conductor, so as to improve the welding performance of metallic conductor, and reduce the surface-active of metallic conductor, the ability that its anti-electrolyte corrodes is enhanced, so as to further improve the sealing performance of battery core, prevents leakage of lithium ion battery.

Description

A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing
Technical field
The utility model is related to a kind of lithium ion cell polar ear more particularly to a kind of lithium ion batteries of high sealing liquid-leakage preventing Lug.
Background technology
Lithium system battery can be divided into lithium battery and lithium ion battery, wherein, lithium ion battery is a kind of secondary cell (charging electricity Pond), it relies primarily on lithium ion, and movement carrys out work between a positive electrode and a negative electrode;In charge and discharge process, Li+Two electrodes it Between embedded back and forth and deintercalation;During charging, Li+From anode deintercalation, cathode is embedded in by electrolyte, cathode is in rich lithium state;It puts It is then opposite when electric.Now, what the electric elements such as mobile phone and laptop used is all lithium ion battery, and usual people are commonly called as it For lithium battery, it is the representative of modern high performance battery as electrode that battery, which generally uses the material for containing elemental lithium,.
With a large amount of uses of the lithium ion battery on electric vehicle, because of the requirement in terms of electric vehicle continuation of the journey, now It is also higher and higher for unit requirement containing electricity (energy density) of battery, meanwhile, the safety of battery also requires higher. In the battery core production process of lithium ion battery, positive electrode collector, negative electrode collector, positive and negative electrode collector diaphragm, positive pole ear, Negative lug connects into an entirety, then with laminated aluminum film bag hermetic package, lug one end in laminated aluminum film bag with Positive and negative electrode current collector is coupled, and one end is coupled outside laminated aluminum film bag with external connection end, the polymer insulation glue and aluminum plastic film of lug Packaging bag welding forms a complete laminated aluminum film bag seal, finally fills electrolyte into laminated aluminum film bag again, So as to complete the making of lithium ion battery cell.And if lithium ion battery poor sealing may will appear electrolyte leakage, It fails so as to cause battery core, that is, battery is scrapped.In complete laminated aluminum film bag seal, other positions are all by same What a kind of nonmetallic materials welding formed, for example same entirety of welding effect, only lug be metal with it is nonmetallic bonding, glue Effect is connect far away from same material, therefore, the leakproofness at lug position is most weak, and the sealing bonding interface then can once failing Lead to leakage of lithium ion battery so as to the failure of entire lithium ion battery or even the relevant safety accident such as can catch fire, danger The safety of evil user.Therefore the problem of above-mentioned is directed to, this weak spot with reference to lug is needed to be improved, to promote lithium ion The safety that battery uses.
Utility model content
(1) technical problems to be solved
In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of high sealing liquid-leakage preventings Lithium ion cell polar ear, the lithium ion cell polar ear increase the adhesive force between metallic conductor and polymer insulating film, make two Person's bonding is more firm, so as to improve the sealing performance of battery core, meanwhile, because improving the surface roughness of metallic conductor, so as to The welding performance of metallic conductor is improved, and reduces the surface-active of metallic conductor, enhances the energy that its anti-electrolyte corrodes Power so as to further improve the sealing performance of battery core, prevents leakage of lithium ion battery.
(2) technical solution
In order to solve the above-mentioned technical problem, the utility model provides the lithium ion battery of such a high sealing liquid-leakage preventing Lug, metallic conductor and transversal heat seal including rectangular patch in the band-like polymer insulating film of the solid-state on metallic conductor, In, the surface roughness of metallic conductor is 15-20 μm, and the two sides of metallic conductor change into semicircular arc.
Preferably, which is positive pole ear, and the metallic conductor is aluminum rectangular sheet.
Preferably, which is negative lug, and the metallic conductor is copper nickel plating rectangular sheet.
(3) advantageous effect
The utility model compared with prior art, first, it is existing in the case of in lithium ion cell polar ear metallic conductor table Surface roughness is less than or equal to 5 μm, and in the technical program, by breakthrough adjustment, and coordinates existing lithium ion battery The various properties of polymer insulating film in lug, are improved to 15-20 μm by the surface roughness of metallic conductor, thereby increase lithium Effective contact area of metallic conductor and polymer insulating film in ion battery lug, so as to improve own metal conductor and height The adhesive force of molecule insulating film makes the two bonding more firm, so as to improve the sealing performance of battery core, it is therefore prevented that lithium ion battery Leakage;Secondly, changed by the roughness on above-mentioned metallic conductor surface, so as to improve the welding performance of metallic conductor, make it It is more convenient for soldering, so as to improve the quality of lithium ion battery and safety, meanwhile, the surface for reducing metallic conductor is lived Property, the ability that its anti-electrolyte corrodes is enhanced, and then improve the sealing performance of battery core, it is therefore prevented that the leakage of lithium ion battery Liquid;Finally, the two sides of metallic conductor change into semicircular arc, and the way of contact of this coherent smooth-going makes metallic conductor and high score Insulating sublayer film is more bonded, and makes the two adherency closer, so as to further improve the sealing performance of battery core, it is therefore prevented that lithium ion The leakage of battery.
In general, which increases the adhesive force between metallic conductor and polymer insulating film, makes The two bonding is more firm, so as to improve the sealing performance of battery core, meanwhile, because improving the surface roughness of metallic conductor, from And the welding performance of metallic conductor is improved, and reduce the surface-active of metallic conductor, enhance what its anti-electrolyte corroded Ability so as to further improve the sealing performance of battery core, prevents leakage of lithium ion battery.
Description of the drawings
Illustrate the utility model embodiment or technical solution of the prior art in order to clearer, it below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, to those skilled in the art, in the premise not made the creative labor Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram of the utility model lithium ion cell polar ear.
Fig. 2 is the A-A sectional views of Fig. 1 in the utility model lithium ion cell polar ear.
Label in attached drawing for:1- metallic conductors, 2- polymer insulating films.
Specific embodiment
To be easy to understand technical means, creative features, achievable purpose and effectiveness of the utility model, below Clear, complete description will be carried out to the technical scheme in the embodiment of the utility model with reference to attached drawing, this reality is expanded on further With novel, it is clear that described embodiment is only the part of the embodiment of the utility model, instead of all the embodiments.
A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing, as depicted in figs. 1 and 2, the lithium-ion electric of the utility model Pond lug is same as the prior art, equally also including rectangular patch metallic conductor 1 and transversal heat seal on metallic conductor 1 The band-like polymer insulating film 2 of solid-state, details are not described herein again;Unlike, the surface roughness of metallic conductor 1 is 15-20 μm, the two sides of metallic conductor 1 change into semicircular arc.
The technical program compared with prior art, first, it is existing in the case of in lithium ion cell polar ear metallic conductor table Surface roughness is less than or equal to 5 μm, and in the technical program, by breakthrough adjustment, and coordinates existing lithium ion battery The various properties of polymer insulating film in lug, are improved to 15-20 μm by the surface roughness of metallic conductor, thereby increase lithium Effective contact area of metallic conductor and polymer insulating film in ion battery lug, so as to improve own metal conductor and height The adhesive force of molecule insulating film makes the two bonding more firm, so as to improve the sealing performance of battery core, it is therefore prevented that lithium ion battery Leakage;Secondly, changed by the roughness on above-mentioned metallic conductor surface, so as to improve the welding performance of metallic conductor, make it It is more convenient for soldering, so as to improve the quality of lithium ion battery and safety, meanwhile, the surface for reducing metallic conductor is lived Property, the ability that its anti-electrolyte corrodes is enhanced, and then improve the sealing performance of battery core, it is therefore prevented that the leakage of lithium ion battery Liquid;Finally, the two sides of metallic conductor change into semicircular arc, and the way of contact of this coherent smooth-going makes metallic conductor and high score Insulating sublayer film is more bonded, and makes the two adherency closer, so as to further improve the sealing performance of battery core, it is therefore prevented that lithium ion The leakage of battery.
Lug is divided into two kinds of positive pole ear and negative lug, when the lithium-ion electric of the high sealing liquid-leakage preventing in the technical program Pond lug is as positive pole ear in use, above-mentioned metallic conductor 1 is aluminum rectangular sheet.When the high sealing leakproof in the technical program The lithium ion cell polar ear of liquid is as negative lug in use, above-mentioned metallic conductor 1 is copper nickel plating rectangular sheet, also, metal is led The two sides of body 1 also change into semicircular arc.
The foregoing describe the technical characteristics and basic principle and associated advantages of the utility model, for art technology For personnel, it is clear that the utility model is not limited to the details of above-mentioned exemplary embodiment, and without departing substantially from the utility model In the case of design or essential characteristic, the utility model can be realized in other specific forms.Which point therefore, no matter come from It sees, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by appended claims Rather than above description limits, it is intended that all changes capsule that will be fallen within the meaning and scope of the equivalent requirements of the claims It includes in the utility model.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (3)

1. a kind of lithium ion cell polar ear of high sealing liquid-leakage preventing, metallic conductor (1) and transversal heat seal including rectangular patch in The band-like polymer insulating film (2) of solid-state on metallic conductor (1), which is characterized in that the surface roughness of metallic conductor (1) is 15-20 μm, the two sides of metallic conductor (1) change into semicircular arc.
A kind of 2. lithium ion cell polar ear of high sealing liquid-leakage preventing according to claim 1, which is characterized in that the battery pole Ear is positive pole ear, and the metallic conductor (1) is aluminum rectangular sheet.
A kind of 3. lithium ion cell polar ear of high sealing liquid-leakage preventing according to claim 1, which is characterized in that the battery pole Ear is negative lug, and the metallic conductor (1) is copper nickel plating rectangular sheet.
CN201721697482.6U 2017-12-08 2017-12-08 A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing Active CN207530032U (en)

Priority Applications (1)

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CN201721697482.6U CN207530032U (en) 2017-12-08 2017-12-08 A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721697482.6U CN207530032U (en) 2017-12-08 2017-12-08 A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111446409A (en) * 2020-05-20 2020-07-24 天津市捷威动力工业有限公司 Preparation method of long-durability lithium ion battery polymer tab
CN113972448A (en) * 2021-10-19 2022-01-25 东莞新能安科技有限公司 Electrochemical device and electronic device comprising same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111446409A (en) * 2020-05-20 2020-07-24 天津市捷威动力工业有限公司 Preparation method of long-durability lithium ion battery polymer tab
CN113972448A (en) * 2021-10-19 2022-01-25 东莞新能安科技有限公司 Electrochemical device and electronic device comprising same
CN113972448B (en) * 2021-10-19 2022-08-09 东莞新能安科技有限公司 Electrochemical device and electronic device comprising same

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Address after: 341000 Workshop No. 5 of Shuixi Rare Earth Deep Processing Surface Finishing Industry Centralized Control Zone (Phase I) of Ganzhou Cobalt Molybdenum Rare Metal Industry Base, Zhanggong District, Ganzhou City, Jiangxi Province

Patentee after: Ganzhou Zhongjin High Energy Battery Material Co., Ltd.

Address before: 341000 Workshop No. 5 of Shuixi Rare Earth Deep Processing Surface Finishing Industry Centralized Control Zone (Phase I) of Ganzhou Cobalt Molybdenum Rare Metal Industry Base, Zhanggong District, Ganzhou City, Jiangxi Province

Patentee before: Ganzhou gold high energy battery material Co., Ltd.